Buffer for loom-pickers.



UNITED STATES PATENT OFFICE.

JOHN TARANTO, QF WALTHAM, MASSACHUSETTS.

BUFFER FOR LOQlVE-PICKERS.

Application filed September 26, 1916.

To all whom it may concern:

Be it known that I, JOHN TARANTO, a citizen of the United States, and residing at Valtham, county of Middlesex, State of Massachusetts, have invented an Improvement in Buffers for LOOIIl-PlCkGIS,.Of which the following description, in connection with the accompanying.drawing, is a specification, like characters on .the drawing representing like parts.

This invention relates to a novel buffer mechanism for use with looms.

In loom structures it is desirable to employ some means for taking-up or absorbing the shock of stoppage of the picker after it has thrown the shuttle. A very common form is a piece of leather having a plurality of apertures through which the picker rod is passed .so that the leather strip assumes a sinuous position on the picker rod. The picker at the end of the throw of the shuttle is thereby prevented from striking the portion of the casting in which the .picker rod is held. As the picker moves along the rod it strikes the leather strip, compacts it and the shock of stoppage is thus taken up. As the picker rod is kept well-oiled, the leather buffer in a short time becomes per- .meated not only reducing its efficiency but also in conjunction with the incessant hammering to which it is subject, makes its fiber peel off in small particles. These oil-soaked particles are thrown on the threads and injure the woven cloth. Likewise do the picker and the leather buffs throw oil.

This invention contemplates the provision of a bufiing means whereby the leather strip is dispensed with and whereby the resilient portion of the novel bufling means is inclosed so that oil and dirt may not be thrown on the cloth thereby. This is achieved by the employment of a buffer head apertured to receive therethrough the picker rod. The head is mounted on the end of a rod yieldably held in outer extended position by means of a coiled spring inclosed in a box-structure or casing fastened to the lay. WVith such construction the throwing of oil or dirt upon the threads or cloth is obviated and a buffer is provided which will stand up under hard usage and which will maintain uniformity of cushioning function.

The object therefore is to provide a durable, efiicient buffer for a loom picker.

Another object is to provide a loom picker Specification of Letters Patent.

Patented June 26, 1917.

Serial No. 122,312.

buffer which will function to pre ent oil and other substances from being thrown upon the threads and woven cloth.

Other objects of the invention will more fully appear from the following description and the accompanying drawings and will be pointed out in the annexed claim.

In the accompanying drawings, there has been disclosed a structure designed to carry out the objects of the invention, but it is to be understood that the invention is not confined to the exact features shown, as various changes may be made within its reasonable scope.

Figure 1 shows a portion of a loom with the novel buffer mechanism applied thereto;

Fig. 2 is an enlarged sectional detail of the buffer;

Fig. 3 is a plan view of the same; and

Fig. at is a section on the line H of Fig. 3.

In this selected embodiment of this invention it is shown as attached to the lay l of a loom provided with the usual lay sword 2 and pitma-n 3 pivotally secured to the shaft 4 held by the ears 5. The usual picker rod 6 is shown as received within the apertured ears 7 and 8 on the lay, the ear 8 having a screw 9 by which means the rod is firmly held in adjusted position. The usual picker 10 is slidably mounted upon the rod 6, being connected, as is common, by the leather strap 11 to the picker stick 12.

This novel buffer mechanism comprises, "in this embodiment, a support by means of which the buffer is secured to the lay. The support here disclosed is a casting 13 having depending legs 14, apertured to receive bolts by which it is secured to the lay. A box or casing 37 is preferably adjustably secured to this support. The casing 37 has a flange 15 which is slotted to receive the bolts 16 and complementary washers. These bolts are held in holes in a flange 17 on the support and pass through the slots 18 of the box flange. The casing or box is there fore adjustable in the axial plane of the picker rod.

The casing 37 has therein a longitudinal recess 19 to receive the tension means which is provided in order to hold the buffer rod 20 with its terminal head 21 in outer, yieldable, extended position. In this preferred embodiment, the tension means comprises a heli cal spring 22 coiled about the buffer rod 20 which extends through the casing. The

spring 22 is positioned within the recess 19 therefor. The forward, or headed end, portion 23 of the rod is preferably rectangular in section and is slidable in a similarly shaped recess formed by the neck 9A of the casing and the casing cover 25. The cover is secured to the casing by any suitable means as for example by screws 26. The rectangular rod portion preferably terminates in a shouldered portion 27 against which the forward end of the spring abuts. The inclosed portion of the buffer rod is preferably circular in section and, passing through the spring recess, may project outwardly through the circular recess 28 of the casing. A leather Washer 29 is affixed to the rear end of the casing and is apertured to permit the rod to pass therethrough. The function of this Washer is to prevent the escape of oil placed in the spring recess.

The head 21 is terminally secured to the rectangular portion 23 of the buffer rod and is downwardly curved so that the path of traverse of its impact portion 30 is in axial alinement with the path of the picker 10 on the picker rod. The impact portion 30 of the head is provided with a preferably central aperture 31 through which, in assembling the buffer, the picker rod is passed. The aperture 31 is of such diameter that the head may reciprocate, under the impact of the picker, out of contact with the picker rod 6. In this embodiment, the aperture 31 is provided with a bushing and the impact portion of the head has an apertured member 38, preferably of leather, screwed thereto against which the picker directly strikes.

The ear 7 is apertured, as is customary, and to obviate the contingency of the picker rod 6 becoming released by the screw 9 of the opposite ear 8 and flying out upon-the loom parts, this invention comprehends a boss 3% which is preferably cast integrally with the support and functions to prevent the picker rod from passing through the apertured ear 7. lVhile not essential it is deemed desirable to provide the support with a substantially central longitudinal rib which has its complement in a longi tudinal recess in the bottom face of the casing. Such construction aids in assembling and maintaining the casing in proper alinement on the support under all conditions of adjustment. Oil apertures 36 are Copies of this patent may be obtained for provided in the casing cover 25 for the introduction of a lubricant into the spring chamber or recess.

In functioning, the picker stick is abruptly actuated, as is usual and pushes the picker along the picker rod, causing the picker to strike the shuttle and throw it across the lay. The movement of the picker, as is wellknown, is rapid and such continued hammerings on the old sinuous picker rod leather strap causes the oil, carried along the picker rod by the picker, to be forced on the strap which soon becomes oil-soaked and deteriorates. The oil and dirt are not only thrown or squirted about the adjacent loom parts and upon the weaving cloth but also particles of the oil-soaked strap are thrown thereupon. This novel organization dispenses with the sinuous buffer strap and its inherent disadvantages. The oil on the picker rod is not thrown, as the cushioning effect is obtained by the coiled spring working in the casing. The end washer eifectually prevents oil from coming out the casing rear. The parts of this device are few and can be easily and cheaply cast into the preferable form. It is durable, simple, efficient, easy to install on a loom and performs its function efficiently.

It is to be understood that the construction disclosed herein is illustrative but not restrictive and that the same may be modified within the meaning and scope of the claim which follows.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is:

A buifer support for loom pickers includ-.

ing a buffer support on the lay, a resilient means on said support, an impact member carried by said means and yieldably held in the picker path whereby the stoppage of the picker is cushioned, a casing for said means on said support, means on the support for adjusting the position of the impact memher, and a longitudinal rib on said support to engage a complementary recess in the casing, said rib and recess being in axial alinement with the picker rod whereby the impact member may be adjusted in a plurality of positions in alinement with the picker path.

In testimony whereof, I have signed my name to this specification.

JOHN TARANTO.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

